We have been improving a neutron spin echo (NSE) spectrometer at CZ_2 port of JRR-3M, JAERI.Performance tests of the new monochromator constructed in collaboration with ILL, Grenoble, France and HMI, Berlin, Germany indicate a threefold increase in polarized neutron flux at the sample compared to the previous one. Our NSE experiments using MESS at LLB in Saclay, France showed that the performance of our NSE spectrometer was comparable to that of MESS.In order to further gain neutron intensity, we have been installing a detector system with an assembly of position sensitive detectors.NSE experiments have been performed to study the slow dynamics such as membrane undulation in Complex Fluids involving amphiphiles. Intermediate correlation functions I(Q,t) obtained from our IiSE.experiments were well fitted to the equation I(Q,t) =I(Q,O)[(GAMMAt)2/3] for the dipalmitoylphosphatidylcholine (DPPC)-water-CaCl_2 system and for the low temperature and high temperature bicontinuous microemulsio
… Moren phases and the lamella phase of the nonionic surfactant C_<12>E_5/ n-octane / water system, and also for the dense droplet phase of, the temperature-induced and the pressure-induced lamella phases of the ionic swfactant AOT / n-decane / water system. The relaxation rate GAMMA increased as Q_3. From these results, the theory of Zilman and Granek, in which they use the Heifrich bending free energy to describe membrane undulations in sponge and lamellar phases, was first supported by o ur NSE experiments. We estimated the bending modulus of the membranes using their theory. For aqueous solutions of non-ionic surfactant C_<16>E_7 with wormlike micelles, the results that I(Q,t) =I(Q,O)[(GAMMAt)3/4]and GAMMA increased as Q ^<8/3> are also explained by their theory for 1-dimensional polymer-like model.(1) 非イオン性両親媒子を含むn-オクタン-水-C_<12>E_5系での双連結型マイクロエマルションの低温相および高温相、ラメラ相について内部界面の波状ゆらぎに関するダイナミックスを調べた。中性子スピンエコー実験の解析に最近Zilmanらによって提唱された界面膜の波状ゆらぎのダイナミックスの理論を初めて適用し、この理論の有効性を実証し、界面膜の曲げ弾性率を求めた。(2) ラメラ構造での脂質膜の波状運動のメカニズムを明らかにするために、リン脂質DPPC-水系に塩化カルシウムを加えた系で脂質2重層膜の波状ゆらぎに関るダイナミックスを中性子スピンエコー法で調べ、Zilmanらの理論が成り立つことを示し、ラメラ相での脂質2重層膜の曲げ弾性率を求めた。(3) 非イオン性両親媒子C_<16>E_7-水系の紐状ミセルを中性子スピンエコー法で調べ、Zilmanらの理論を適用し、紐状ミセルの集団運動が低濃度領域ではミセルの自由拡散、高濃度領域ではレプテーション運動に支配されていることを提唱した。(4) イオン性両親媒子AOT/水/n-デカン3元系で温度上昇でも圧力上昇でも同様の構造相転移を示す組成について中性子スピンエコー実験を行い、Zilmanらの理論を適用した。得られた界面膜の曲げ弾性率から温度と圧力による構造相転移は異なった機構を持っていることを提唱した。 Less